Hi can you help me with these questions please

Is it possible for an object to be in motion if no net force is acting on it? Explain. If an object is at rest, can we conclude that no external forces are acting on it? CONCEPTUAL QUESTIONS 5. Abeach ball is left in the bed of a pickup truck. Describe what happens to the ball when the truck accelerates forward. 6. A large crate is placed on the bed of a truck but is not tied down. a. As the truck accelerates forward, the crate slides across the bed until it hits the tailgate. Explain what causes this. b. If the driver slammed on the brakes, what could happen to the crate